岩性油气藏 ›› 2020, Vol. 32 ›› Issue (4): 1–11.doi: 10.12108/yxyqc.20200401

• 油气地质 •    下一篇

柴达木盆地英西地区页岩油储层特征及有利区优选

张道伟1, 薛建勤2, 伍坤宇3, 陈晓冬3, 王牧3, 张庆辉3, 郭宁3   

  1. 1. 中国石油青海油田分公司, 甘肃 敦煌 736202;
    2. 中国石油 青海油田分公司 勘探事业部, 甘肃 敦煌 736202;
    3. 中国石油 青海油田分公司 勘探开发研究院, 甘肃 敦煌 736202
  • 收稿日期:2019-09-29 修回日期:2020-02-21 出版日期:2020-08-01 发布日期:2020-06-16
  • 第一作者:张道伟(1972-),男,博士,教授级高级工程师,主要从事油气勘探方面的研究工作。地址:(736202)甘肃省敦煌市七里镇青海油田分公司1号办公楼。Email:zdwqh@petrochina.com.cn
  • 通信作者: 伍坤宇(1986-),男,博士,高级工程师,主要从事油气勘探与沉积储层方面的研究工作。Email:wukunyu1986@126.com。
  • 基金资助:
    国家油气重大专项“柴达木盆地复杂构造区油气成藏、关键勘探技术与新领域目标优选”（编号：2017ZX05001-003）和中国石油天然气股份有限公司科技重大专项“柴达木盆地建设高原大油气田勘探开发关键技术研究与应用”（编号：2016E-0102）联合资助

Shale oil reservoir characteristics and favorable area optimization in Yingxi area,Qaidam Basin

ZHANG Daowei1, XUE Jianqin2, WU Kunyu3, CHEN Xiaodong3, WANG Mu3, ZHANG Qinghui3, GUO Ning3   

  1. 1. PetroChina Qinghai Oilfield Company, Dunhuang 736202, Gansu, China;
    2. Department of Geophysical Exploration, PetroChina Qinghai Oilfield Company, Dunhuang 736202, Gansu, China;
    3. Research Institute of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang 736202, Gansu, China
  • Received:2019-09-29 Revised:2020-02-21 Online:2020-08-01 Published:2020-06-16

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摘要： 研究柴达木盆地英西地区古近系页岩油储层特征，开展了储层岩石学特征、物性及储集空间类型、含油性、源储配置关系等分析，并优选了有利储层发育区。结果表明：①英西地区下干柴沟组上段储层的岩石矿物包括碳酸盐、陆源碎屑、泥质及各种盐类矿物，混积特征明显；②综合地质和测井响应特征将研究区储层划分为3类，分别为层状泥页岩或泥质碳酸盐岩、块状泥页岩或泥质碳酸盐岩、斑状泥页岩或泥质碳酸盐岩储层；③储层主要储集空间类型包括晶间孔、粒间或晶间溶蚀孔、角砾孔洞和裂缝，物性总体偏低，孔隙度多为4%~6%，渗透率多为0.05~0.10 mD；④油气藏具有"源内成藏、整体含油"的特征，目的层含油丰度受控于物性和烃源岩的配置关系。该研究成果对英西地区页岩油勘探具有指导作用。

关键词: 页岩油, 源内成藏, 咸化湖, 下干柴沟组, 英西地区, 柴达木盆地

Abstract: In order to understand the characteristics of Paleogene oil shale reservoirs in Yingxi area of Qaidam Basin, the petrological characteristics,physical properties,reservoir space,oil-bearing properties and source-reservoir occurrence relationship were analyzed,and favorable reservoir development areas were optimized. The results show that:(1)mineral compositions of reservoir-rocks in the upper member of Xiaganchaigou Formation demonstrate typically mixed features,including carbonates,terrigenous clastic,argillaceous and evaporite minerals. (2)According to the comprehensive geological and logging responses characteristics,the reservoirs in the study area were divided into three types, including laminated shale/argillaceous carbonate reservoirs, massive shale/argillaceous carbonate reservoirs and phenocrystal shale/argillaceous carbonate reservoirs.(3)The main pore spaces in reservoirs include inter-crystal pores,intergranular/inter-crystal dissolved pores,inter-breccia pores and fractures. In summary,the physical properties of reservoirs are nor good,their porosities range from 4% to 6% and permeabilities range from 0.05 to 0.10 mD.(4)The reservoir is characterized by "intra-source accumulation and wholebody oil-bearing",and the oil-bearing abundance of the target layer is controlled by reservoir properties and its relationship with the source rocks. This study results have a guiding role for shale oil exploration in Yingxi area.

Key words: shale oil, intra-source accumulation, saline lacustrine, Xiaganchaigou Formation, Yingxi area, Qaidam Basin

中图分类号: 

  • TE122.1
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